package com.itheima.reggin.config;

import com.itheima.reggin.common.JacksonObjectMapper;

import lombok.extern.slf4j.Slf4j;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;

import java.util.List;

@Slf4j
@Configuration

public class WebMvcConfig extends WebMvcConfigurationSupport {
    /*
    * 设置静态资源映射
    * @param registry
    * */
    protected void addResourceHandlers(ResourceHandlerRegistry registry){
        log.info("开始进行静态资源映射...");
        registry.addResourceHandler("/backend/**").addResourceLocations("classpath:/backend/");
        registry.addResourceHandler("/front/**").addResourceLocations("classpath:/front/");
    }

    /*
    * 扩展mvc框架的消息转换器
    * @param converters
    * */
    @Override
    protected void extendMessageConverters(List<HttpMessageConverter<?>>
                                           converters){
        log.info("扩展消息转换器");
        //创建消息转换器对象
        MappingJackson2HttpMessageConverter messageConverter = new MappingJackson2HttpMessageConverter();
        //设置对象转换器，底层使用Jackson将java对象转换为json
        messageConverter.setObjectMapper(new JacksonObjectMapper());
        //将上面的消息转换器对象追加到mvc框架的转换集合中
        converters.add(0,messageConverter);
    }
}
